(上海大學(xué) 材料科學(xué)與工程學(xué)院，上海 200072)
摘 要: 通過(guò)調(diào)整固體粉末滲鋁法工藝在鎳基高溫合金DZ417G基體上制備了Ni-Al二元成分區(qū)間內(nèi)組織可控的γ′-Ni3Al、γ′-Ni3Al+β-NiAl、β-NiAl、β-NiAl+δ-Ni2Al3和δ-Ni2Al3涂層，采用光學(xué)顯微鏡、X射線(xiàn)衍射儀和掃描電鏡對(duì)涂層的結(jié)構(gòu)、斷面形貌以及高溫氧化后的表面形貌進(jìn)行觀察和分析。900 ℃和1 100 ℃空氣恒溫氧化實(shí)驗(yàn)結(jié)果表明：涂層能顯著提高材料的抗氧化性能，在涂層厚度相同的情況下，NiAl涂層抗氧化性能最好。
關(guān)鍵字: 高溫合金；包埋滲；涂層；抗氧化性能
（School of Materials Science and Engineering, Shanghai University, Shanghai 200072, China）
Abstract:The γ′-Ni3Al, γ′-Ni3Al+β-NiAl, β-NiAl, β-NiAl+δ-Ni2Al3 and δ-Ni2Al3 coatings with structures controllable in the Ni-Al binary components range on Ni-based superalloy DZ417G were prepared by using appropriate pack cementation processes. The structures, cross sections and surface morphologies after high temperature oxidation of the coatings were observed and analyzed by optical microscopy, X-ray diffractometry and scanning electron microscopy. The experimental results of isothermal air oxidation at 900 ℃ and 1 100 ℃ indicate that these coatings can significantly improve the oxidation resistance of the substrate materials, and the oxidation resistance of NiAl coatings is the best at the same thickness of coatings.
Key words: superalloy; pack cementation; coatings; oxidation resistance
